3.78 ct Radiant Laboratory-Grown Diamond

What reads well

• A 1.41:1 length-to-width ratio sits in the classic radiant range.
• Face-up spread (10.85 × 7.72 mm) is typical or better for a 3.78 ct radiant.
• Table 65% and depth 67.5% fall in the typical radiant range.
• D color is in the colorless range.
• IF clarity: inclusions are not a practical visual factor.

What deserves a closer look

• Screening only: for this radiant, check images or video of the exact stone for the sparkle pattern (defined flashes or "crushed ice") and any dark or see-through corners.
• Treatment status is not stated on the report. For a laboratory-grown diamond, ask whether it is as-grown or post-growth treated.
• Not stated on the report: polish, symmetry. These are not assumed to be favorable, and confidence is lower.

The reading, field by field

Table · Ideal

At 65%, the table sits within the typical 60–70% range for a radiant, balancing brightness with fire.

Total depth · Ideal

67.5% is within the typical 61–68% range for a radiant, keeping weight where it contributes to face-up size and light return.

Length-to-width · Ideal

A 1.41:1 outline is within the classic 1.2–1.5:1 range for a radiant.

Girdle · Ideal

Medium - sl. thick: a durable girdle thickness that doesn't hide meaningful weight.

Culet · Ideal

None: no visible culet facet when viewed face-up.

Color · Ideal

D is in the colorless range and faces up white in any metal.

Clarity · Ideal

Internally Flawless (IF): inclusions, if any, are only visible under magnification.

Fluorescence · Ideal

None: no meaningful effect on appearance.

What to check on the exact stone

• Can you confirm the stone's weight and measurements match the GCAL report before it is set?

Report facts

Origin

Laboratory-grown

Carat

3.78 ct

Shape

Radiant

Cut grade

Not given for this shape

Color

D

Clarity

IF

Measurements

10.85 × 7.72 × 5.22 mm

Table

65%

Total depth

67.5%

Crown angle

Not given for this shape

Pavilion angle

Not given for this shape

Polish

Not stated

Symmetry

Not stated

Girdle

Medium - sl. thick

Culet

None

Fluorescence

None